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-rw-r--r--u-boot/board/csb226/flash.c366
1 files changed, 366 insertions, 0 deletions
diff --git a/u-boot/board/csb226/flash.c b/u-boot/board/csb226/flash.c
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+++ b/u-boot/board/csb226/flash.c
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+/*
+ * (C) Copyright 2002
+ * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * (C) Copyright 2002
+ * Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
+ *
+ * (C) Copyright 2003 (2 x 16 bit Flash bank patches)
+ * Rolf Peukert, IMMS gGmbH, <rolf.peukert@imms.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/arch/pxa-regs.h>
+
+#define FLASH_BANK_SIZE 0x02000000
+#define MAIN_SECT_SIZE 0x40000 /* 2x16 = 256k per sector */
+
+flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
+
+
+/**
+ * flash_init: - initialize data structures for flash chips
+ *
+ * @return: size of the flash
+ */
+
+ulong flash_init(void)
+{
+ int i, j;
+ ulong size = 0;
+
+ for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
+ ulong flashbase = 0;
+ flash_info[i].flash_id =
+ (INTEL_MANUFACT & FLASH_VENDMASK) |
+ (INTEL_ID_28F128J3 & FLASH_TYPEMASK);
+ flash_info[i].size = FLASH_BANK_SIZE;
+ flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
+ memset(flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT);
+
+ switch (i) {
+ case 0:
+ flashbase = PHYS_FLASH_1;
+ break;
+ default:
+ panic("configured too many flash banks!\n");
+ break;
+ }
+ for (j = 0; j < flash_info[i].sector_count; j++) {
+ flash_info[i].start[j] = flashbase + j*MAIN_SECT_SIZE;
+ }
+ size += flash_info[i].size;
+ }
+
+ /* Protect monitor and environment sectors */
+ flash_protect(FLAG_PROTECT_SET,
+ CONFIG_SYS_FLASH_BASE,
+ CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
+ &flash_info[0]);
+
+ flash_protect(FLAG_PROTECT_SET,
+ CONFIG_ENV_ADDR,
+ CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
+ &flash_info[0]);
+
+ return size;
+}
+
+
+/**
+ * flash_print_info: - print information about the flash situation
+ */
+
+void flash_print_info (flash_info_t *info)
+{
+ int i, j;
+
+ for (j=0; j<CONFIG_SYS_MAX_FLASH_BANKS; j++) {
+
+ switch (info->flash_id & FLASH_VENDMASK) {
+ case (INTEL_MANUFACT & FLASH_VENDMASK):
+ printf ("Intel: ");
+ break;
+ default:
+ printf ("Unknown Vendor ");
+ break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case (INTEL_ID_28F128J3 & FLASH_TYPEMASK):
+ printf("28F128J3 (128Mbit)\n");
+ break;
+ default:
+ printf("Unknown Chip Type\n");
+ return;
+ }
+
+ printf(" Size: %ld MB in %d Sectors\n",
+ info->size >> 20, info->sector_count);
+
+ printf(" Sector Start Addresses:");
+ for (i = 0; i < info->sector_count; i++) {
+ if ((i % 5) == 0) printf ("\n ");
+
+ printf (" %08lX%s", info->start[i],
+ info->protect[i] ? " (RO)" : " ");
+ }
+ printf ("\n");
+ info++;
+ }
+}
+
+
+/**
+ * flash_erase: - erase flash sectors
+ */
+
+int flash_erase(flash_info_t *info, int s_first, int s_last)
+{
+ int flag, prot, sect;
+ int rc = ERR_OK;
+
+ if (info->flash_id == FLASH_UNKNOWN)
+ return ERR_UNKNOWN_FLASH_TYPE;
+
+ if ((s_first < 0) || (s_first > s_last)) {
+ return ERR_INVAL;
+ }
+
+ if ((info->flash_id & FLASH_VENDMASK) != (INTEL_MANUFACT & FLASH_VENDMASK))
+ return ERR_UNKNOWN_FLASH_VENDOR;
+
+ prot = 0;
+ for (sect=s_first; sect<=s_last; ++sect) {
+ if (info->protect[sect]) prot++;
+ }
+
+ if (prot) return ERR_PROTECTED;
+
+ /*
+ * Disable interrupts which might cause a timeout
+ * here. Remember that our exception vectors are
+ * at address 0 in the flash, and we don't want a
+ * (ticker) exception to happen while the flash
+ * chip is in programming mode.
+ */
+
+ flag = disable_interrupts();
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect<=s_last && !ctrlc(); sect++) {
+
+ printf("Erasing sector %2d ... ", sect);
+
+ /* arm simple, non interrupt dependent timer */
+ reset_timer_masked();
+
+ if (info->protect[sect] == 0) { /* not protected */
+ u32 * volatile addr = (u32 * volatile)(info->start[sect]);
+
+ /* erase sector: */
+ /* The strata flashs are aligned side by side on */
+ /* the data bus, so we have to write the commands */
+ /* to both chips here: */
+
+ *addr = 0x00200020; /* erase setup */
+ *addr = 0x00D000D0; /* erase confirm */
+
+ while ((*addr & 0x00800080) != 0x00800080) {
+ if (get_timer_masked() > CONFIG_SYS_FLASH_ERASE_TOUT) {
+ *addr = 0x00B000B0; /* suspend erase*/
+ *addr = 0x00FF00FF; /* read mode */
+ rc = ERR_TIMOUT;
+ goto outahere;
+ }
+ }
+ *addr = 0x00500050; /* clear status register cmd. */
+ *addr = 0x00FF00FF; /* reset to read mode */
+ }
+ printf("ok.\n");
+ }
+ if (ctrlc()) printf("User Interrupt!\n");
+
+outahere:
+ /* allow flash to settle - wait 10 ms */
+ udelay_masked(10000);
+
+ if (flag) enable_interrupts();
+
+ return rc;
+}
+
+/**
+ * write_long: - copy memory to flash, assume a bank of 2 devices with 16bit each
+ */
+
+static int write_long (flash_info_t *info, ulong dest, ulong data)
+{
+ u32 * volatile addr = (u32 * volatile)dest, val;
+ int rc = ERR_OK;
+ int flag;
+
+ /* read array command - just for the case... */
+ *addr = 0x00FF00FF;
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((*addr & data) != data) return ERR_NOT_ERASED;
+
+ /*
+ * Disable interrupts which might cause a timeout
+ * here. Remember that our exception vectors are
+ * at address 0 in the flash, and we don't want a
+ * (ticker) exception to happen while the flash
+ * chip is in programming mode.
+ */
+ flag = disable_interrupts();
+
+ /* clear status register command */
+ *addr = 0x00500050;
+
+ /* program set-up command */
+ *addr = 0x00400040;
+
+ /* latch address/data */
+ *addr = data;
+
+ /* arm simple, non interrupt dependent timer */
+ reset_timer_masked();
+
+ /* wait while polling the status register */
+ while(((val = *addr) & 0x00800080) != 0x00800080) {
+ if (get_timer_masked() > CONFIG_SYS_FLASH_WRITE_TOUT) {
+ rc = ERR_TIMOUT;
+ /* suspend program command */
+ *addr = 0x00B000B0;
+ goto outahere;
+ }
+ }
+
+ /* check for errors */
+ if(val & 0x001A001A) {
+ printf("\nFlash write error %02x at address %08lx\n",
+ (int)val, (unsigned long)dest);
+ if(val & 0x00080008) {
+ printf("Voltage range error.\n");
+ rc = ERR_PROG_ERROR;
+ goto outahere;
+ }
+ if(val & 0x00020002) {
+ printf("Device protect error.\n");
+ rc = ERR_PROTECTED;
+ goto outahere;
+ }
+ if(val & 0x00100010) {
+ printf("Programming error.\n");
+ rc = ERR_PROG_ERROR;
+ goto outahere;
+ }
+ rc = ERR_PROG_ERROR;
+ goto outahere;
+ }
+
+outahere:
+ /* read array command */
+ *addr = 0x00FF00FF;
+ if (flag) enable_interrupts();
+
+ return rc;
+}
+
+
+/**
+ * write_buf: - Copy memory to flash.
+ *
+ * @param info:
+ * @param src: source of copy transaction
+ * @param addr: where to copy to
+ * @param cnt: number of bytes to copy
+ *
+ * @return error code
+ */
+
+/* "long" version, uses 32bit words */
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+ ulong cp, wp;
+ ulong data;
+ int l;
+ int i, rc;
+
+ wp = (addr & ~3); /* get lower word aligned address */
+
+ /*
+ * handle unaligned start bytes
+ */
+ if ((l = addr - wp) != 0) {
+ data = 0;
+ for (i=0, cp=wp; i<l; ++i, ++cp) {
+ data = (data >> 8) | (*(uchar *)cp << 24);
+ }
+ for (; i<4 && cnt>0; ++i) {
+ data = (data >> 8) | (*src++ << 24);
+ --cnt;
+ ++cp;
+ }
+ for (; cnt==0 && i<4; ++i, ++cp) {
+ data = (data >> 8) | (*(uchar *)cp << 24);
+ }
+
+ if ((rc = write_long(info, wp, data)) != 0) {
+ return (rc);
+ }
+ wp += 4;
+ }
+
+ /*
+ * handle word aligned part
+ */
+ while (cnt >= 4) {
+ data = *((ulong*)src);
+ if ((rc = write_long(info, wp, data)) != 0) {
+ return (rc);
+ }
+ src += 4;
+ wp += 4;
+ cnt -= 4;
+ }
+
+ if (cnt == 0) return ERR_OK;
+
+ /*
+ * handle unaligned tail bytes
+ */
+ data = 0;
+ for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
+ data = (data >> 8) | (*src++ << 24);
+ --cnt;
+ }
+ for (; i<4; ++i, ++cp) {
+ data = (data >> 8) | (*(uchar *)cp << 24);
+ }
+
+ return write_long(info, wp, data);
+}
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